Kindle Fire HD is built for the best in gaming, with full tilt, turn, and multi-touch controls...

Up Your Game with GameCircle

Earn achievements, compare scores with GameCircle and Facebook friends, or take on the world with global leaderboards. GameCircle titles with Whispersync automatically store your progress in the cloud, so you'll never lose an unlocked level or saved game, even if you delete it from your device. "

I wonder what is involved with activating this Whispersync..

"...games, and music that you buy for your Kindle Fire HD can also be enjoyed on Amazon apps for Windows, Mac, Android, iOS, game consoles, TVs and more."

Anyways, all of this is coming from info you can find directly at amazon.com, so check it out!